The league office cannot even get this fine straight. Per the article attached to the tweet:
What happened if the Schefter's sources were correct? Per NFL Operations
Accountability: Fines & Appeals (
link)
, personal messages' first offense is $10,927.
Kittle got a $13,659 hit. That would be the exact fine amount for unsportsmanlike conduct first offense. That makes sense since he flashed it during the game.
However, it was a personal message on his t-shift, which is part of his uniform. Where is the additional $10,927 fine? Heck. A uniform violation (i.e. undergarments, etc.) carries another $5,464.
Either take appropriate fine enforcement or do nothing at all. The player will not feel the fine's pinch anyway.